"25 years of active multisport coaching has proven that Joe Friel has an unprecedented understanding of endurance sports. As a multiple triathlon world champion, I would consider Joe as one of the leading figures in triathlon coaching today. Joe's professional approach and practical understanding of sports physiology has helped many endurance athletes of all abilities reach their full athletic potential." Simon Lessing, 5-time Triathlon World Champion. "Joe Friel's training books have made the once "crazy" sport of triathlon accessible to the public while also guiding seasoned athletes to their full potential." Barb Lindquist. Joe Friel has spent most of his life in devotion to the understanding and teaching of sport. Joe has managed to focus on the key components to athletic success while weeding out the noise. Justin Daerr, professional triathlete.

Joe Friel is the best-selling author of The Triathlete's Training Bible and Your First Triathlon. His TrainingBible Coaching franchise is one of the most successful and respected in endurance sports. Joe has trained endurance athletes since 1980, including national champions, world championship contenders, and Olympic athletes in triathlon, duathlon, road cycling, and mountain biking. He is an elite-certified USA Triathlon and USA Cycling Coach and holds a master's degree in exercise science. He conducts training and racing seminars around the world and provides consulting services for corporations in the fitness industry. He has also been active in business as the founder of Ultrafit, an association of coaching businesses; TrainingPeaks, a web based software company; and TrainingBible Coaching.